21 citations · 41 across the 3 of their papers we have counts for
11 papers · 1 filter
Understanding the Protected Nodes and Collapse of the Fermi Arcs in Underdoped Cuprate Superconductors
Qijin Chen, K. Levin
We show how recent angle resolved photoemission measurements addressing the Fermi arcs in the cuprates reveal a very natural phenomenological description of the complex superfluid…
The pseudogap state in superconductors: Extended Hartree approach to time-dependent Ginzburg-Landau Theory
Jelena Stajic, Andrew Iyengar, Qijin Chen +1
It is well known that conventional pairing fluctuation theory at the Hartree level leads to a normal state pseudogap in the fermionic spectrum. Our goal is to extend this Hartree a…
Origin of the pseudogap phase: Precursor superconductivity versus a competing energy gap scenario
K. Levin, Qijin Chen, Ioan Kosztin +3
In the last few years evidence has been accumulating that there are a multiplicity of energy scales which characterize superconductivity in the underdoped cuprates. In contrast to…
Short Coherence Length Superconductivity: A Generalization of BCS Theory for the Underdoped Cuprates
K. Levin, Qijin Chen, Ioan Kosztin
On the basis of the observed short coherence lengths in the cuprates we argue that a BCS-Bose-Einstein condensation (BEC) crossover approach is an appropriate starting point for co…
Nodal Quasiparticles versus Phase Fluctuations in High Tc Superconductors: An Intermediate Scenario
Qijin Chen, Ioan Kosztin, K. Levin
We explore a BCS Bose Einstein crossover scenario for and its implications for the superfluid density and specific heat. The low lying excitations consist of no…
Unusual thermodynamical and transport signatures of short coherence length superconductors: A BCS Bose-Einstein crossover approach
Qijin Chen, Ioan Kosztin, K. Levin
In this paper we present predictions for thermodynamic and transport properties of a BCS Bose-Einstein crossover theory, below Tc, which theory satisfies the reasonable constraints…